package com.javadaemon.rpgengine.model;

/*
	Copyright (c) 2011, Morten Andersen
	All rights reserved.

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions are met:
	* Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	* Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in the
	documentation and/or other materials provided with the distribution.
	* The name of the author may not be used to endorse or promote products
	derived from this software without specific prior written permission.

	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
	ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	DISCLAIMED. IN NO EVENT SHALL MORTEN ANDERSEN BE LIABLE FOR ANY
	DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**
 * The TileMap class contains the tiles of a single 2D map, and maps
 * coordinates to the specific tiles.
 * 
 * @author Somnium
 *
 */
public class TileMap {
	private Tile[][] tiles; // The Tiles contained in the TileMap
	private int width, height; // The width and height of the TileMap
	
	public TileMap(int width, int height)
	{
		this.width = width;
		this.height = height;
		tiles = new Tile[this.width][this.height];
	}
	
	/**
	 * Returns the tile at the specified coordinates, or null if the coordinates are invalid.
	 * @param x
	 * @param y
	 * @return The tile at the requested coordinates.
	 */
	public Tile getTile(int x, int y)
	{
		if (insideBounds(x, y))
		{
			return tiles[x][y];
		}
		else
		{
			return null;
		}
	}
	
	/**
	 * Sets the tile at the specified coordinates, if the coordinates are valid. 
	 * @param x
	 * @param y
	 * @param tile
	 */
	public void setTile(int x, int y, Tile tile)
	{
		if (insideBounds(x, y))
		{
			tiles[x][y] = tile;
		}
	}
	
	public int getWidth()
	{
		return this.width;
	}
	
	public int getHeight()
	{
		return this.height;
	}
	
	/**
	 * Helper method, which checks whether the given coordinates are valid
	 * (i.e. within the bounds of the TileMap)
	 * 
	 * @param x
	 * @param y
	 * @return True if the coordinates are valid, false otherwise.
	 */
	private boolean insideBounds(int x, int y)
	{
		return (x >=0 && x < width && y >= 0 && y < height);
	}
}
